His system is: I7 2600k, 16GB RAM, Nvidia GTX 970 - practically all settings to maximum apart from sniper mode effects and vegetation in sniper mode. The map was quite difficult: Stalingrad.
His results are:
Minimum FPS in 9.6 - 43, in 9.7 - 57
Maximum FPS in 9.6 - 121, in 9.7 - 121
Average FPS in 9.6 - 82, in 9.7 - 89
According to the feedback of the testers, the worse your PC is, the more noticeable the FPS increase is with the owners of very poor PC's noticing a lot better FPS.